Twitter employees have held conversations about selling some user names for the service since at least December, the people said. Engineers have discussed running online auctions where people can bid for the user names, which are the words, numbers or string of characters that follow the @ sign by which accounts are identified on the platform. Mr. Musk’s user name, for example, is @elonmusk.
It’s unclear if the project will move forward and if the plan affects all user names or only a subset
Source: nytimes.com